normally a roofed base only requires reapirs,when damages by an enemy
make sure all the walls have the proper roof above to prevent degenerating when it rains

for the roof: its a good choice to have some sort of chimney
at least a roof area thats a bit higher then the main roof to prevent the fire from going low on rainy days

latest variant to guide the smoke outside
https://steamcommunity.com/sharedfiles/filedetails/?id=2652995033

and older solution:
https://steamcommunity.com/sharedfiles/filedetails/?id=2647924019

both chinmeys are roofed

Originally posted by Sentient Entropy:

Originally posted by Menzagitat:

The game should give better hints about this possibility.

I disagree. Smoke should need vented or it should fill the space completely. I don't like that smoke will just vanish into high ceilings, it's unrealistic.

i think it would not make sense gamewise - as the game will freeze and crash with a room full of smoke

like making a game often requires making decisions between realism and performance